JP2002541621A - Magnet system for relay - Google Patents

Abstract

The invention relates to components forming a magnet system of a relay, characterized in particular by low-noise switches. This magnet system comprises a coil unit 1, an armature 6, and a coil (not shown). The armature 6 is preloaded in the open position. When viewed along the direction of closure, the armature 6 is formed such that the front end of the armature pole face is substantially orthogonal to the connection line 16 leading to the placement edge 12, so that the low noise switch is Achieved. Further, when the armature 6 is sucked, the core pole face 9 becomes at least substantially parallel to the armature pole face 8. The system provided in the present invention has a very simple and compact structure, since no additional noise reduction components are required.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a magnet system for a relay having the following features. That is, a core unit having at least one armature bearing portion formed on a first leg and two legs formed with pole portions on a second leg, and rotatably mounted on an armature bearing portion around a bearing edge. An armature in which an operating gap is formed between the armature pole surface of the armature free end and the core pole surface of the pole portion by being preloaded by a spring force in the open position. A coil that surrounds the core unit at any position.

[0002] Magnet systems for electromagnetic relays for switching DC loads, preferably used in motor vehicles, produce noisy switching noise inside the motor vehicle. It is known to use a double-walled housing with, for example, sound absorbers, in order to reduce this switching noise, in particular from the impact of the armature against the pole faces. This known measure is elaborate and expensive. Although the volume of the relay is increased and only a sound absorbing effect or a soundproofing effect is obtained, the fundamental problem of sound generation remains unsolved. In addition, noise may be transmitted to the outside via the connection conductor. In addition, the double-walled housing reduces the thermal conductivity, which limits the operating capacity of such relays.

[0003] A solution to avoid noise generation consists of using a magnet system with a damper to reduce the speed of movement of the armature.

A relay that achieves noise reduction by reducing the armature speed is known from EP 281384. In this relay, an additional air attenuator is coupled to the armature and contact spring system. The disadvantage of this structure is that the attenuator makes the relay more expensive and also increases the required space.

It is an object of the present invention to provide a magnet system of the type described above which has a simple structure and exhibits a low-noise switching operation.

According to the invention, the armature pole face in the front end region of the armature along the closing direction is substantially orthogonal to the connection line towards the bearing edge, and when the armature is sucked, the core pole This object is achieved by a magnet system of the type described above, characterized in that the face extends at least parallel to the armature pole face.

In the relay according to the present invention, the pole faces of the armature and the core unit are parallel to each other in the closed rest position because the armature moves and approaches the pole face at the right angle before directly reaching the closed position. There is an advantage.

In addition, a particularly simple structure is obtained in that no additional components are required to achieve the low-noise switching operation.

[0009] Preferably, movement of the armature is limited by a stop located proximate the bearing edge.

When closing the armature, a particularly good noise reduction is achieved when the working gap between the pole faces is not completely closed, so that a residual working gap remains and the armature pole face and the core pole face are separated from each other. Be parallel.

[0011] Further details and embodiments are set out in the dependent claims.

The invention is explained in more detail by means of an embodiment and the corresponding figures. FIG. 1 is a perspective view of the magnet system of the present invention. FIG. 2 is a diagram showing the arrangement of the core pole surface and the armature of the magnet system of the present invention. FIG. 3 illustrates the implementation of FIG.
Fig. 3 shows a magnet system similar to Fig. 1, wherein the armature is shown in two end positions. 4 to 6 are views showing another embodiment of the magnet system of the present invention.

In one embodiment of FIG. 1, the core unit 1 has a first leg 2 and a second leg 3, which are connected by a cross member 13. The second leg 3 has an obtuse angle and a horizontal member 13.
Is placed on top. As a result of this U-shape, the armature bearing part 4 is arranged on the first leg 2 and the pole part 5 is arranged on the second leg 3. The substantially L-shaped armature 6 is rotatably mounted on the armature bearing part 4 around the bearing edge 12 and closes the magnetic circuit over the working gap 10 between the armature bearing part 4 and the pole part 5. The armature 6 is arranged so that the L-shaped cross leg corresponding to the armature free end 7 in FIG. 1 points outward.

The armature 6 deviates from a straight L-shape in that it is bent inward at the intermediate part 15, resulting in bending about the armature end on the armature bearing part 4. Therefore, in cooperation with the inclined second leg 3, the size of the structure can be reduced.

The working gap 10 is arranged between the pole part 5 forming the core pole face 9 and the armature free end 7 forming the armature pole face 8. The armature 6 in the closed position is adjacent to the armature bearing surface 11 of the armature bearing 4 in the armature bearing 4. Since the two protrusions 14 are formed integrally with the armature 6, the armature 6 cannot slip in the direction of the pole 5 and is completely sucked into the pole. This ensures that the residual working gap 10 remains. Thus, in addition to avoiding impact noise, entanglement or sticking of the armature 6 in the closed position is avoided.

To achieve a high level of magnetic circuit efficiency, the core unit 1 and the armatures 6, 40, 50, 60 are manufactured from ferromagnetic materials. However, it is also conceivable to use other materials, which reduce the efficiency of the magnetic circuit in that case, but maintain the advantageous noise behavior.

FIG. 2 illustrates the basic elements of the present invention. The armature 6 is designed such that the armature pole face 8 in the region of the front end 8a in the closing direction is substantially perpendicular to the connecting line 25 facing the bearing edge 12, indicated by the dashed line in FIG. When the armature 6 is sucked, the arrangement of the core pole face 9 and the armature 6 results in the core pole face 9 extending substantially parallel to the armature pole face 8, so that the core pole face 9 is also orthogonal to the connection line 25. I do.

FIG. 2 also illustrates the arrangement of the combined bearing, return contact spring 20. The first portion 20a of the spring 20 has a return function,
The armature 6 is pressed against the bearing edge 12. This prevents the armature 6 from separating in the region of the bearing edge 12. The end of this part 20a is firmly attached to a restraint 24 having a fixed part of the structure, for example a housing to be added. The second part is a contact spring 2 carrying the movable contact 22.
1 and cooperates with one fixed contact 23 depending on the position of the armature 6 in any case.

FIG. 3 shows a slight variation of the magnet system of FIG. In contrast to the second leg 3 of FIG. 1, the second leg 31 exhibits a kink, so that the leg 31 a located on the crosspiece 13 is orthogonal to the crosspiece but intended to have the crosspiece 13. The pole portion 32 of the extension shows a slight obtuse angle. In addition, FIG. 3 shows the coil 30 surrounding the first leg 34. Armature 6
Is preloaded in the open position and is indicated at 6 (I). In this position,
The working gap 10 is wedge-shaped because the pole faces 8, 9 are at an acute angle to each other.

An opening angle 33 corresponding to the angle between the pole faces 8 and 9 is formed between the armature 6 and the armature bearing surface 11 of the armature bearing portion 35.
This opening angle 33 is a relatively large 6 ° to 15 ° compared to the corresponding angle of a conventional folded armature system, which is typically 5 °. in addition,
The pole faces 8, 9 do not completely overlap.

By energizing the coil, as soon as a magnetic flux is generated in the magnet system, the armature 6 enters a rolling process around the bearing rim 12 in the direction of the closed position and moves against the spring tension, whereby , The overlap of the pole faces 8, 9 increases. On the other hand, pole face 8
, 9 are smaller. In the closed state, the pole faces 8, 9 are parallel to each other at a predetermined distance without contact. Due to the decrease in the angle, the overlapping of the pole faces 8, 9 increases during the closing process, the distance between the pole faces 8, 9 decreases, and the inductance of the arrangement from the coil 30 and the core unit 1 is strong and one. Increase. The force component generated by the magnetic flux along the moving direction of the armature pole face 8 is reduced by the arrangement of the armature 6 and the core pole face 9 during the closing process. As a result of both effects, the movement of the armature is slow as compared to conventional folding armature systems.

In the present embodiment, the movement of the armature 6 is controlled by the armature bearing surface 1.
Limited by a stop formed from one. The armature bearing surface 11
It can be horizontal or show any other structure, for example to maximize stopping behavior. This stop in connection with the projection 14 ensures that in the closed position a residual working gap 10 remains between the pole faces 8,9. Thus, no switch noise occurs in the regions of the pole faces 8 and 9. However, the armature bearing surface 11
In this case, impact noise is generated, and the moving speed of the armature 6 on this surface becomes smaller than that of the armature pole surface 8. Thus, the impact of the armature 6 on the armature bearing surface 11 is less than the impact of the armature pole face on the core pole face of the conventional folded armature system.

In addition, the impact of the armature 6 on the armature bearing surface 11, as well as the impact of a contact pair connected to the armature 6, is particularly low noise due to the slower movement speed of the armature.

The magnet system of the present invention can exhibit different shapes. The core unit and the armature can be maximized, for example, in such a way that a particularly compact structure is achieved or that the pole surfaces are designed to be particularly large to ensure a particularly good magnetic flux. Also, the shape of the contact system for combination with the armature,
Armature and core unit design can be affected.

In the embodiment shown in FIG. 4, the armature 40 deviates from a straight L-shape because it is bent outward at the intermediate portion 43. The L-shaped side leg corresponds to the armature free end 41 and points inward, in contrast to the examples shown in FIGS. Nevertheless, the connecting line 42 between the bearing edge 12 and the core pole face 9 is orthogonal to the armature pole face 8 as well as the core pole face 9 in the closed position.

Another shape possibility of the magnet system of the present invention is shown in the embodiment of FIG. The coil is disposed on the second leg 52. The first leg 51 has on its outside a shoulder 55 which forms the bearing edge 12 in cooperation with the U-shaped armature 50. Thus,
The armature 50 grips the first leg 51. The stopping operation occurs on the armature bearing surface 56 of the armature bearing portion 53, and in this case, FIGS.
Is located parallel to the core pole face 9 on the pole portion 54 in contrast to the armature bearing face of the armature.

Also in the embodiment of FIG. 6, the armature 60 is designed in a U-shape. The bearing rim 12 and the coil (not shown) are located on the same leg 2, in contrast to the example of FIG. A further difference is the fixing of the position of the bearing edge 12 achieved by the two projections 61. Since these projections 61 are connected to the armature 60 and grip around the armature bearing portion 62, the armature 60 and the projections 61 are arranged at the closed position of the two side surfaces and the edge of the third side surface. And adjacent to. As in the example of FIG. 5, the armature bearing surface 64 is located parallel to the armature pole surface 8 on the pole portion 63.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnet system according to the present invention.

FIG. 2 is a diagram showing an arrangement of a core pole surface and an armature of the magnet system of the present invention.

FIG. 3 shows a magnet system similar to FIG. 1 implemented with coils, the armature being shown in two end positions.

FIG. 4 is a diagram showing another embodiment of the magnet system of the present invention.

FIG. 5 is a diagram showing another embodiment of the magnet system of the present invention.

FIG. 6 is a diagram showing another embodiment of the magnet system of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coil unit 2,34,51 First leg 3,31,52 Second leg 4,35,53,62 Armature bearing part 5,32,54,63 Pole part 6,40,50,60 Armature 7,41 Armature Free end 8 Armature pole face 8a Front end 9 Core pole face 10 Working gap 11,56,64 Armature bearing face 12 Bearing edge 15,43 Intermediate part 16,25,42 Connection line

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Cologne, Josef Germany Day-13629 Berlin Strassecue Nummer 7 (72) Inventor Peach, Kirsten Germany Day-12169 Berlin Bo Pusbederstraße 7

Claims (16)

[Claims] At least one armature bearing part (4) is provided on the first leg (2; 34; 51).
35; 53; 62) is formed on the second leg (3; 31; 52).
54; 63) formed at least two of said legs (2, 3; 34, 31; 5).
Core unit (1) having an armature bearing portion (4; 35; 53; 62) around a bearing edge.
), The armature (6; 40; 50; 60) being rotatably mounted on the armature free end (7;
An armature (6; 40; 50) in which a working gap (10) is formed between the armature pole face (8) of 41) and the core pole face (9) of the pole part (5; 32; 54; 63).
60), wherein the armature pole face (8) in the region of the front end (8a) in the closed position has a connecting line (16; 25; 42) facing the bearing edge (12). The core pole face (9) extends at least approximately parallel to the armature pole face (8) when the armature (6; 40; 50; 60) is suctioned. A magnet system for a relay characterized by the following. 2. The armature pole face (8) and the core pole face (9) are provided with the armature (8).
6; 40; 50; 60) extending substantially linearly along the direction of movement, wherein said armature (6; 40; 50; 60) forms an acute angle when in the open position. The described magnet system. 3. The magnet system according to claim 1, wherein a residual working gap (10) remains between the pole faces (8, 9) even in the closed position. 4. An armature bearing surface (11; 56; 64) of said armature bearing portion (4; 35; 53; 62); and said armature (6; 40; 50; 60).
And the armature at the end (6; 40; 50; 60)
2. The magnet system according to claim 1, wherein, depending on the position, the second gap has a wedge shape when the armature is in the open position and disappears to a large extent when the armature is in the closed position. 5. The magnet system according to claim 1, wherein a device outside the polar surface region limits movement of the armature (6; 40; 50; 60). 6. The magnet system according to claim 5, wherein the device for restricting movement of the armature when the armature (6; 40; 50; 60) is in the closed position comprises a stop. 7. The magnet system according to claim 5, wherein the device for restricting movement of the armature when the armature (6; 40; 50; 60) is in a closed position comprises a spring. 8. The magnet system according to claim 6, wherein when the armature (6; 40; 50; 60) is in the closed position, the armature only partially contacts the stop. 9. The armature (11; 56; 64) is provided on the armature (11).
7. The magnet system according to claim 4, wherein the stop is formed for each of 6; 40; 50; 60). 10. A vertical axis of the armature bearing portion (4; 35; 53; 62) and a vertical axis of the pole portion (5; 32; 54; 63) correspond to the armature (6; 40; 50; 60).
3. The magnet system according to claim 1, wherein the magnet system is located in the moving plane of (1). 11. The magnet system according to claim 4, wherein the armature bearing surface (11; 56; 64) is curved. 12. The vertical axis of the armature bearing portion (4; 35; 53; 62) and the vertical axis of the pole portion (5; 32; 54; 63) are not parallel to each other. The described magnet system. 13. The armature (6; 40) located on the armature bearing portion (4; 35), wherein the armature (6; 40) is substantially L-shaped.
2. The magnet system according to claim 1, wherein the intermediate part (15; 43) is bent in relation to the part (1). 14. The magnet system according to claim 1, wherein the armature is substantially U-shaped. 15. The armature (50; 60) has a substantially flat surface at each end region, one of which faces the core pole surface (9) and the other of which is the armature bearing surface. The magnet system according to claim 1, wherein the magnet system has an S shape so as to face (11). 16. An end region of the armature (6; 40) forms a substantially straight portion, so that one of the straight portions of the armature (6; 40) is located in one plane, and the one plane is 16. The magnet system according to claim 13, wherein the other straight portion is traversed substantially in the middle of the vertical extension.